Struct SPProblem 

pub struct SPProblem { /* private fields */ }

Modifiable counterpart of SPInstance: items can be placed and removed, strip can be extended or fitted.

Implementations

impl SPProblem

pub fn new(instance: SPInstance) -> Result<Self>

Creates a problem, returning an error if its strip cannot form a container.

pub fn change_strip_width(&mut self, new_width: f32) -> Result<()>

Modifies the width of the strip in the back, keeping the front fixed. Returns an error without changing the problem if the new container is invalid.

pub fn fit_strip(&mut self) -> Result<()>

Shrinks the strip to the minimum width that fits all items. Returns an error if no items are placed.

pub fn place_item(&mut self, placement: SPPlacement) -> PItemKey

Places an item according to the given SPPlacement in the problem. Panics if the item’s demand is exhausted.

pub fn remove_item(&mut self, pkey: PItemKey) -> SPPlacement

Removes a placed item from the strip. Returns the placement of the item.

pub fn save(&self) -> SPSolution

Creates a snapshot of the current state of the problem as a SPSolution.

pub fn restore(&mut self, solution: &SPSolution)

Restores the state of the problem to the given SPSolution.

pub fn instance(&self) -> &SPInstance

pub fn strip(&self) -> &Strip

pub fn layout(&self) -> &Layout

pub fn item_demand_qtys(&self) -> &[usize]

pub fn density(&self) -> f32

pub fn strip_width(&self) -> f32

pub fn n_placed_items(&self) -> usize

Trait Implementations

impl Clone for SPProblem

fn clone(&self) -> SPProblem

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.